Palestinian Prime Minister Ismail Haniyeh threatened to "deal with" shots at his convoy at the Rafah crossing on Thursday night, which Hamas said was a Fatah attempt to assassinate him.
Haniyeh's bodyguard was killed in the shooting, and more than two dozen people, including the premier's son, Abed, 27, were injured. A Hamas official said that the son was not badly hurt.
Haniyeh was held up at the Rafah crossing between Egypt and Gaza Strip for hours as Israel tried to prevent him from bringing in $35 million raised on a trip abroad.
Arriving home around midnight, Haniyeh appeared furious over the gunfire at his convoy. He blamed Israel for the delay but added, "we know the party that shot directly at our cars, injuring some of the people with me... and we also know how to deal with this."
"The bodyguard to Ismail Haniyeh was killed during an assassination attempt," said Hamas spokesman Fawzi Barhoum.
Palestinian president Mahmoud Abbas expressed regret for the shooting, and his presidential guard denied responsibility for the shooting.
